This study analyzed the correlative study between the peak intensity of the geomagnetic storm, interplanetary magnetic field (IMF) and the peak value of various plasma parameters during the solar cycle 24. This study has been performed using hourly values of the geomagnetic storm time (Dst) < -50 nT for the period 2008 to 2016. 173 events of disturbance storm time with solar wind velocity ≥ 350 km/s were selected for the entire period 2008 to 2016. The peak value of Dst index is well correlated with IMF, southward component of the interplanetary magnetic field (Bz), as well as the electric field. The southward component of the IMF is the fundamental cause of geomagnetic disturbance, and the effect of velocity is greater than the density effect. It is reported that there exists a linear relationship between Dst with IMF, Bz and plasma parameters: Electric field (Ey), proton density, solar wind velocity, and flow pressure.

 

Key words: Plasma parameters, geomagnetic storms, interplanetary magnetic field.